TW201324293A - Touch sensing method and touch sensing apparatus using charge distribution manner - Google Patents

Abstract

A touch sensing method using charge distribution manner is disclosed. First, charges in a panel are removed. Next, a scanning signal is provided to scan a plurality of sensing regions of the panel. Subsequently, the panel is set in a first switching mode for charging the panel with the scanning signal. After that, the panel is set in a second switching mode for distributing the injected charges in the panel. Next, an equivalent voltage is acquired after the charges are distributed at an equilibrium state. Furthermore, a touch sensing apparatus using charge distribution manner is disclosed herein.

Description

Charge distribution type touch sensing method and sensing device thereof

The present invention relates to a touch sensing method and a sensing device thereof, and more particularly to a charge distribution type touch sensing method and a sensing device thereof.

In today's high-tech technology, more and more electronic product operation interfaces have begun to use panels for users to input information with their fingers or stylus. The panel has a plurality of touch technologies, wherein the capacitive panel detects the change of the charge in the sensing capacitor to determine the touch position of the finger or the stylus. In addition, the capacitive panel has the advantages of better light transmittance and less damage, and is widely used in various electronic products.

However, the sensing device of the conventional capacitive panel needs to use a built-in high-precision capacitor to measure the sensing capacitance in the panel, and the better voltage amplification effect can be obtained because the value of the built-in high-precision capacitor and the sensing capacitor are close to each other. Therefore, the sensing device needs to have several built-in high-precision capacitors with different capacitance values to measure the unknown sensing capacitance in the panel. Alternatively, it is necessary to perform multiple integration and complicated calculation procedures on the voltage measurement result of the sensing capacitor to obtain a better voltage output for the determination of the touch area.

Therefore, the conventional techniques still have the above drawbacks and deficiencies to be solved.

One aspect of the present disclosure relates to a charge distribution type touch sensing method. First, exclude the charge in the panel. A scan signal is then provided to scan a plurality of sensing regions of the panel. Next, the panel is set in the first switching mode to charge the panel through the scan signal. Thereafter, the panel is set in the second switching mode to change the distribution state of the charge injected by the panel. Subsequently, the equivalent voltage after the charge balance distribution is obtained.

In accordance with an embodiment of the present disclosure, the scan signal includes a plurality of voltage levels.

In accordance with an embodiment of the present disclosure, the panel injects and distributes charge in a positive charge distribution mode or a negative charge distribution mode in accordance with a scan signal.

According to an embodiment of the present disclosure, when the panel is disposed in the first switching mode, the charge is injected into the equivalent parasitic capacitance of the sensing capacitance of the scanned sensing region and the panel by the scanning signal.

According to an embodiment of the present disclosure, when the panel is disposed in the second switching mode, the charge injected by the sensing capacitor and the equivalent parasitic capacitance is redistributed to the sensing capacitor, the equivalent parasitic capacitance, and the unscanned sensing region. In the effect of the sensing capacitor.

According to an embodiment of the present disclosure, when the panel is disposed in the first switching mode, the charge is injected into the equivalent sensing capacitance of the unscanned sensing region by the scan signal.

According to an embodiment of the present disclosure, when the panel is disposed in the second switching mode, the charge injected by the equivalent sensing capacitor is redistributed to the sensing capacitance of the scanned sensing region, the equivalent parasitic capacitance of the panel, and the equivalent sensing. In the capacitor.

According to an embodiment of the present disclosure, when the panel is disposed in the first switching mode, the sensing capacitance of the scanned sensing region, the equivalent parasitic capacitance of the panel, and the equivalent sensing capacitance of the unscanned sensing region are transmitted through the scanning signal. Exclude all charges.

According to an embodiment of the present disclosure, when the panel is disposed in the second switching mode, the charge is injected and distributed in the sensing capacitor, the equivalent parasitic capacitance, and the equivalent sensing capacitor by the scan signal.

According to an embodiment of the present disclosure, the charge distribution touch sensing method further includes determining whether the sensing area of the panel is scanned to determine whether to determine the obtained equivalent voltage. When the sensing area is scanned, it is judged whether the object touches or approaches the panel according to the change of the equivalent voltage. When the sensing area has not been scanned, the scanning procedure of one of the sensing areas is performed.

In accordance with an embodiment of the present disclosure, when an object touches or approaches the panel, a plurality of sensing paths are formed between the object and the panel to redistribute the charge, causing a change in the equivalent voltage.

According to an embodiment of the present disclosure, the step of setting the panel in the first switching mode to charge the panel further includes the sensing capacitor in the sensing region to be scanned, the equivalent parasitic capacitance of the panel, and the unscanned sensing region of the panel. The equivalent sense capacitor is charged to a low voltage level or a zero voltage level.

Another technical aspect of the disclosure relates to a charge distribution type touch sensing device, comprising a plurality of first axial electrodes, a plurality of second axial electrodes, a first axial switching unit, and a second axial switch Unit, switch control unit, measuring unit and processing unit. The first axial electrode is disposed in the panel. The second axial electrode is disposed in the panel and interleaved with the first axial electrode to form a plurality of sensing regions. The first axial switch unit is electrically coupled to the first axial electrode. The second axial switch unit is electrically coupled to the second axial electrode. The switch control unit is electrically coupled to the first axial switch unit and the second axial switch unit for controlling a switching mode of the first axial switch unit and the second axial switch unit to inject and distribute charge through the scan signal In the panel. The measuring unit is electrically coupled to the first axial switching unit for obtaining an equivalent voltage of the charge balance distribution. The processing unit is electrically coupled to the measuring unit and the switch control unit, and determines whether the object touches or approaches the panel according to the change of the equivalent voltage obtained by the measuring unit.

According to an embodiment of the present disclosure, the first axial electrode is disposed on an outer surface or an inner surface of a glass substrate of the touch panel, and the second axial electrode is disposed on the touch panel. The outer side surface or the inner side surface of the medium glass substrate.

In accordance with an embodiment of the present disclosure, the panel is a display panel, the first axial electrode is located inside or on the surface of the display panel, and the second axial electrode is located inside or on the surface of the display panel.

According to the technical content described in the above technical aspect of the present disclosure, the touch sensing device can obtain the equivalent voltage after the charge distribution without additionally adding a high-precision capacitor to determine the area where the object touches or approaches the panel.

The embodiments are described in detail below with reference to the accompanying drawings, but the embodiments are not intended to limit the scope of the invention, and the description of the structure operation is not intended to limit the order of execution, any component recombination The structure, which produces equal devices, is within the scope of the present invention. The drawings are for illustrative purposes only and are not drawn to the original dimensions.

FIG. 1 is a circuit block diagram of a charge distribution type touch sensing device 100 according to an embodiment of the disclosure. The charge distribution type touch sensing device 100 includes first axial electrodes X1 to X6, second axial electrodes Y1 to Y6, a first axial switching unit 120, a second axial switching unit 130, a switch control unit 140, and a quantity. The measuring unit 150 and the processing unit 160. The first axial electrodes X1 to X6 are disposed in the panel 1000. The second axial electrodes Y1 Y Y6 are disposed in the panel 1000 and are interleaved with the first axial electrodes X1 X X6 to form a plurality of sensing regions, for example, sensing regions 1011 to 1016, sensing regions 1021 to 1026, and sensing regions. 1031 to 1036, sensing regions 1041 to 1046, sensing regions 1051 to 1056, and sensing regions 1061 to 1066.

The first axial switch unit 120 is electrically coupled to the first axial electrodes X1 XX6. The second axial switch unit 130 is electrically coupled to the second axial electrodes Y1 Y Y6. The switch control unit 140 is electrically coupled to the first axial switch unit 120 and the second axial switch unit 130 for controlling the switching mode of the first axial switch unit 120 and the second axial switch unit 130 to transmit the first An axial scan signal (or referred to as an X-axis scan signal) and a second axial scan signal (or referred to as a Y-axis scan signal) inject charge and distribute charge into the panel 1000. The measuring unit 150 is electrically coupled to the first axial switching unit 120 for obtaining an equivalent voltage after the charge balance is distributed. The processing unit 160 is electrically coupled to the measurement unit 150 and the switch control unit 140, and determines whether an object (eg, a finger or a stylus) touches or approaches the panel 1000 according to the change in the equivalent voltage acquired by the measurement unit 150. It should be noted that the processing unit 160 can map the voltage distribution of the entire panel 1000 according to the above equivalent voltage to determine whether the object touches or approaches the area of the panel 1000.

In one embodiment of the present disclosure, the panel 1000 can be a touch panel (where the touch panel can be attached or otherwise combined with the display panel or other components to form a touch device), and the first axial electrodes X1 X X6 are disposed on The outer side surface or the inner side surface of the touch panel glass substrate, and the second axial electrodes Y1 to Y6 are disposed on the outer side surface or the inner side surface of the glass substrate in the touch panel. That is, the first axial electrodes X1 to X6 and the second axial electrodes Y1 to Y6 may be respectively disposed on the same or different surfaces of the glass substrate.

In another embodiment, the panel 1000 may be a display panel, the first axial electrodes X1 to X6 are located inside the surface of the display panel or the surface thereof, and the second axial electrodes Y1 to Y6 are located inside the surface of the display panel or on the surface thereof.

It should be noted that the arrangement of the above-mentioned axial electrodes with respect to the touch panel or the display panel is an embodiment of the present invention, which is not intended to limit the present invention.

In an embodiment of the present disclosure, each sensing region has a corresponding sensing capacitance. For example, the sensing area 1011 has a corresponding sensing capacitor 1111, the sensing area 1012 has a corresponding sensing capacitance 1112, and so on.

In one embodiment of the present disclosure, the charge distribution touch sensing device 100 further includes a first axial scanning unit 170 and a second axial scanning unit 180. The first axial scanning unit 170 is electrically coupled to the first axial switching unit 120 and the processing unit 160 for generating a first axial scanning signal to sequentially drive the first axial electrodes X1 XX6. The second axial scanning unit 180 is electrically coupled to the second axial switching unit 130 and the processing unit 160 for generating a second axial scanning signal to sequentially drive the second axial electrodes Y1 Y Y6.

In an embodiment of the present disclosure, the first axial switch unit 120 and the second axial switch unit 130 include a first switch group and a second switch group. For example, the first switch group of the first axial switch unit 120 includes the switch 1211 - the switch 1216 , and the second switch group of the first axial switch unit 120 includes the switch 1221 - the switch 1226 . The first switch group of the second axial switch unit 130 includes a switch 1311 - 1316, and the second switch group of the second axial switch unit 130 includes a switch 1321 - switch 1326.

The first switch group (switch 1211 - switch 1216) of the first axial switch unit 120 is electrically coupled between the first axial electrodes X1 - X6 and the first axial scan unit 170, the first axial switch unit The second switch group of 120 (switches 1221 - 1226) is electrically coupled between the first axial electrodes X1 - X6 and the measuring unit 150.

In addition, the first switch group (switch 1311 - switch 1316) of the second axial switch unit 130 and the second switch group (switch 1321 - switch 1326) are electrically coupled to the second axial electrodes Y1 - Y6 and Between the two axial scanning units 180.

In an embodiment of the present disclosure, the measurement unit 150 can include an operation module 151. The operation module 151 can be an analog-to-digital converter (A/D converter, ADC) or a charge integrator for obtaining an equivalent voltage after charge distribution, and converting the equivalent voltage into a digital signal for providing to the processing unit. 160 performs calculations and judgments.

FIG. 2A is a partial circuit diagram of the charge distribution type touch sensing device 100 shown in FIG. 1 . Please refer to both Figure 1 and Figure 2A. When scanning the sensing area 1011 of the panel 1000, the first axial scanning unit 170 provides a first axial scanning signal to the switches 1211 to 1216. At the same time, the second axial scanning unit 180 provides a second axial scanning signal to the switches 1311 to 1316 and the switches 1321 to 1326. It should be noted that the sensing region 1011 formed by staggering the first axial electrode X1 and the second axial electrode Y1 has a corresponding sensing capacitance 1111. Similarly, the sensing region 1012 to the sensing region 1016 formed by interlacing the first axial electrode X1 and the second axial electrode Y2 to Y6 respectively have corresponding sensing capacitors 1112 to 1116. In addition, under the arrangement of the first axial scan signal and the second axial scan signal, the parasitic capacitance effect of a part of the circuit of the panel 1000 is represented by the equivalent parasitic capacitance 1010 at the node a.

FIG. 2B is a partial circuit equivalent diagram of the charge distribution type touch sensing device 100 as shown in FIG. 2A. That is, the sensing capacitors 1112 to 1116 of the unsensed sensing regions 1012 to 1016 can be represented as equivalent sensing capacitors 111n, the switches 1312 to 1316 can be represented as equivalent switches 131n, and the switches 1322 to 1326 can be Expressed as equivalent switch 132n.

FIG. 3 is a schematic flow chart of a charge distribution type touch sensing method according to an embodiment of the disclosure. In this embodiment, the charge distribution type touch sensing method can be implemented by the charge distribution type touch sensing device 100 shown in FIG. 1 , and some of the circuits are the same as those shown in FIG. 2A and FIG. 2B . Or similar, and the following steps are explained. In step 310, the charge in panel 1000 is excluded. Subsequently, in step 320, a scan signal (eg, a first axial scan signal and a second axial scan signal) is provided to scan a plurality of sensing regions of the panel 1000 (eg, sensing regions 1011 to 1016, sensing regions 1021 to 1026, sensing regions 1031 to 1036, sensing regions 1041 to 1046, sensing regions 1051 to 1056, and sensing regions 1061 to 1066). Next, in step 330, the panel 1000 is set in the first switching mode to charge the panel 1000 through the scan signal. Thereafter, in step 340, the panel 1000 is set to the second switching mode to distribute the charge injected by the panel 1000. Subsequently, in step 350, the equivalent voltage after the charge balance distribution is obtained.

In an embodiment of the present disclosure, the charge distribution touch sensing method may further include the following operational steps. In step 360, it is determined whether the sensing area of the panel 1000 has been scanned to determine whether to determine the acquired equivalent voltage. When the sensing area is scanned, it is determined whether the object touches or approaches the panel 1000 according to the change of the equivalent voltage, as shown in step 370. When the sensing area has not been scanned, a scanning procedure under one of the sensing areas is performed, as shown in step 380.

In an embodiment of the present disclosure, the scan signal can include a plurality of voltage levels. For example, the first axial scan signal and the second axial scan signal may include a high voltage level Vdd, a low voltage level Gnd, and a preset voltage level Vtx for providing a voltage required to scan the panel 1000. Level.

In a first embodiment of the present disclosure, panel 1000 injects and distributes charge in a first charge distribution mode in accordance with a scan signal. At this time, the first axial scanning unit 170 may output a first axial scanning signal to provide a high voltage level Vdd to the switch 1211. The second axial scanning unit 180 can output a second axial scan signal to provide a low voltage level Gnd to the switch 1311 and the equivalent switch 132n, provide a high voltage level Vdd to the equivalent switch 131n, and provide a preset voltage level. Vtx is given to switch 1321.

FIG. 4A is a partial circuit equivalent diagram of the charge distribution type touch sensing device 100 in the first switching mode, and the sensing region 1011 of the scanning panel 1000 is taken as an example for illustration. . When the panel 1000 is set in the first switching mode, the first switch group is set in an on state, that is, the switch 1211, the switch 1311, and the equivalent switch 131n are in an on state. The second switch group is set in an off state, that is, the switch 1221, the switch 1321, and the equivalent switch 132n are in an off state. Therefore, the high voltage level Vdd can be transferred to the sensing capacitor 1111 of the scanned sensing region 1011 and the equivalent parasitic capacitance 1010 of the panel 1000 via the switch 1211, so that the charge can be injected and stored in the sensing capacitor 1111 and the equivalent parasitic capacitor 1010. Among them.

FIG. 4B is a partial circuit equivalent diagram of the charge distribution type touch sensing device 100 in the second switching mode in the first embodiment. When the panel 1000 is set in the second switching mode, the first switch group is set to the off state, that is, the switch 1211, the switch 1311, and the equivalent switch 131n are in an off state. The second switch group is set in an on state, that is, the switch 1221, the switch 1321, and the equivalent switch 132n are in an on state. Therefore, the charge originally stored in the sensing capacitor 1111 and the equivalent parasitic capacitor 1010 is redistributed to the equivalent of the sensing capacitor 1111, the equivalent parasitic capacitor 1010, and the unscanned sensing region (eg, sensing region 1012 to sensing region 1016). In the sensing capacitor 111n, the equivalent voltage after the charge balance distribution is obtained through the measuring unit 150. The equivalent voltage is calculated as shown in the following formula:

Where V is the equivalent voltage, Cx1 is the capacitance value of the equivalent parasitic capacitance 1010, Vtx is the preset voltage level, Cptx is the capacitance value of the sensing capacitor 1111, and Cpn is the capacitance value of the equivalent sensing capacitor 111n.

FIG. 5A is a partial circuit equivalent diagram of the charge distribution type touch sensing device 100 when the object 190 touches the scanned sensing region 1011 in the first switching mode. When the object 190 touches or approaches the sensing area 1011, a plurality of sensing paths are formed between the object 190 and the panel 1000, so that the path of charge injection changes. For example, a first sensing path is formed between the node g and the node h, a second sensing path is formed between the node h and the node k, and a third sensing path is formed between the node h and the node j. Since the three sensing paths additionally provide the first external sensing capacitor 1910, the second external sensing capacitor 1920 and the object equivalent capacitor 1940, the electric charge is also injected into the first external sensing capacitor 1910, the second external sensing capacitor 1920 and the object, and the like. Among the capacitors 1940.

FIG. 5B is a partial schematic diagram showing the circuit of the charge-distributing touch sensing device 100 when the object 190 touches the scanned sensing region 1011 in the second switching mode. In this switching mode, three sensing paths identical or similar to those shown in FIG. 5A are also generated between the object 190 and the panel 1000. Therefore, the charge injected in FIG. 5A is redistributed in the sensing path, the sensing capacitor 1111, the equivalent parasitic capacitance 1010, and the equivalent sensing capacitor 111n according to the second switching mode, so that the equivalent voltage after the charge balancing is distributed Less than the equivalent voltage when the object 190 does not touch the sensing area 1011.

The equivalent voltage of the charge balance distribution when the object 190 touches the sensing region 1011 is calculated as follows:

Where V is the equivalent voltage, Cx1 is the capacitance value of the equivalent parasitic capacitance 1010, Vtx is the preset voltage level, Cptx is the capacitance value of the sensing capacitor 1111, Cpn is the capacitance value of the equivalent sensing capacitor 111n, Cxf and Cptxf are The capacitance value of the external sensing capacitance induced between the object 190 and the panel 1000.

6A and 6B are diagrams showing the charge-distributed touch sense when the object 190 touches the unscanned sensing region 1012 to the sensing region 1016 in the first switching mode and the second switching mode in the first embodiment. Part of the circuit equivalent diagram of the measuring device 100. When the object 190 touches or approaches the unscanned sensing area 1012 to the sensing area 1016, a plurality of sensing paths are also formed between the object 190 and the panel 1000, and the charge injection and charge distribution modes thereof are related to FIG. 5A and FIG. 5B. Similar, and will not be described here. Therefore, the equivalent voltage after the charge balance distribution is less than the equivalent voltage when the object 190 does not touch the sensing region 1012 to the sensing region 1016.

In a second embodiment of the present disclosure, panel 1000 injects and distributes charge in a second charge distribution mode in accordance with a scan signal. At this time, the first axial scanning unit 170 may output a first axial scanning signal to provide a low voltage level Gnd to the switch 1211. The second axial scanning unit 180 can output a second axial scan signal to provide a preset voltage level Vtx to the switch 1311, provide a high voltage level Vdd to the equivalent switch 132n, and provide a low voltage level Gnd to the switch 1321 and Equivalent switch 131n.

FIG. 7A is a partial circuit equivalent diagram of the charge distribution type touch sensing device 100 in the first switching mode, and the sensing region 1011 of the scanning panel 1000 is taken as an example for illustration. . When the panel 1000 is set in the first switching mode, the first switch group is set in an on state, that is, the switch 1211, the switch 1311, and the equivalent switch 131n are in an on state. The second switch group is set in an off state, that is, the switch 1221, the switch 1321, and the equivalent switch 132n are in an off state. Therefore, the preset voltage level Vtx can be transferred to the sensing capacitor 1111 of the scanned sensing region 1011 via the switch 1311, so that the charge can be injected and stored in the sensing capacitor 1111.

FIG. 7B is a partial circuit equivalent diagram of the charge-distributing touch sensing device 100 in the second switching mode in the second embodiment. When the panel 1000 is set in the second switching mode, the first switch group is set to the off state, that is, the switch 1211, the switch 1311, and the equivalent switch 131n are in an off state. The second switch group is set in an on state, that is, the switch 1221, the switch 1321, and the equivalent switch 132n are in an on state. Therefore, the charge originally stored in the sensing capacitor 1111 is redistributed to the equivalent sensing capacitor 1111 of the sensing capacitor 1111, the equivalent parasitic capacitance 1010 of the panel 1000, and the sensing region of the unscanned sensing region (eg, the sensing region 1012 to the sensing region 1016). Among them, the equivalent voltage after the charge balance distribution can be obtained through the measuring unit 150. The equivalent voltage is calculated as shown in the following formula:

Where V is the equivalent voltage, Cx1 is the capacitance value of the equivalent parasitic capacitance 1010, Vtx is the preset voltage level, Cptx is the capacitance value of the sensing capacitor 1111, and Cpn is the capacitance value of the equivalent sensing capacitor 111n.

In the present embodiment, when an object (for example, a finger) touches or approaches the panel 1000, the electric field in the vicinity of the panel 1000 is affected, and a plurality of sensing paths are generated, so that the charge is redistributed to generate a change in the equivalent voltage, etc. The calculation method of the effect voltage is similar to that of the first embodiment, and details are not described herein again.

In a third embodiment of the present disclosure, panel 1000 injects and distributes charge in a second charge distribution mode in accordance with a scan signal. At this time, the first axial scanning unit 170 may output a first axial scanning signal to provide a low voltage level Gnd to the switch 1211. The second axial scanning unit 180 can output a second axial scan signal to provide a low voltage level Gnd to the switch 1311, provide a high voltage level Vdd to the equivalent switch 131n and the equivalent switch 132n, and provide a preset voltage level. Vtx is given to switch 1321.

FIG. 8A is a partial circuit equivalent diagram of the charge distribution type touch sensing device 100 in the first switching mode, and the sensing region 1011 of the scanning panel 1000 is taken as an example for illustration. . When the panel 1000 is set in the first switching mode, the first switch group is set in an on state, that is, the switch 1211, the switch 1311, and the equivalent switch 131n are in an on state. The second switch group is set in an off state, that is, the switch 1221, the switch 1321, and the equivalent switch 132n are in an off state. Therefore, the high voltage level Vdd can be transferred to the equivalent sensing capacitance 111n of the unscanned sensing region 1012 to the sensing region 1016 via the equivalent switch 131n, so that the charge can be injected and stored in the equivalent sensing capacitor 111n.

FIG. 8B is a partial circuit equivalent diagram of the charge distribution type touch sensing device 100 in the second switching mode in the third embodiment. When the panel 1000 is set in the second switching mode, the first switch group is set to the off state, that is, the switch 1211, the switch 1311, and the equivalent switch 131n are in an off state. The second switch group is set in an on state, that is, the switch 1221, the switch 1321, and the equivalent switch 132n are in an on state. Therefore, the charge originally stored in the equivalent sensing capacitor 111n is redistributed into the sensing capacitor 1111 of the scanned sensing region 1011, the equivalent parasitic capacitance 1010 of the panel 1000, and the equivalent sensing capacitor 111n, and can pass through the measuring unit 150. The equivalent voltage after the charge balance distribution is obtained, and the equivalent voltage is calculated in the same or similar manner as the second embodiment, and details are not described herein again.

In a fourth embodiment of the present disclosure, panel 1000 injects and distributes charge in a second charge distribution mode in accordance with a scan signal. At this time, the first axial scanning unit 170 may output a first axial scanning signal to provide a low voltage level Gnd to the switch 1211. The second axial scanning unit 180 may output a second axial scan signal to provide a low voltage level Gnd to the switch 1311, the equivalent switch 131n and the equivalent switch 132n, and a predetermined voltage level Vtx to the switch 1321.

FIG. 9A is a partial circuit equivalent diagram of the charge distribution type touch sensing device 100 in the first switching mode, and is illustrated by taking the sensing region 1011 of the scanning panel 1000 as an example. . When the panel 1000 is set in the first switching mode, the first switch group is set in an on state, that is, the switch 1211, the switch 1311, and the equivalent switch 131n are in an on state. The second switch group is set in an off state, that is, the switch 1221, the switch 1321, and the equivalent switch 132n are in an off state. Therefore, the sensing capacitor 1111 of the scanned sensing region 1011, the equivalent parasitic capacitance 1010 of the panel 1000, and the equivalent sensing capacitor 111n of the unscanned sensing region 1012 to the sensing region 1016 can remove all charges through the low voltage level Gnd. In other words, the equivalent sense capacitance 111n of the unscanned sensing region 1012 to the sensing region 1016 is charged to a low voltage level Gnd or a zero voltage level.

FIG. 9B is a partial circuit equivalent diagram of the charge distribution type touch sensing device 100 in the second switching mode in the fourth embodiment. When the panel 1000 is set in the second switching mode, the first switch group is set to the off state, that is, the switch 1211, the switch 1311, and the equivalent switch 131n are in an off state. The second switch group is set in an on state, that is, the switch 1221, the switch 1321, and the equivalent switch 132n are in an on state. Therefore, the second axial scanning unit 180 can output a second axial scanning signal to provide a preset voltage level Vtx to the switch 1321, so that the charge is injected and distributed to the sensing capacitor 1111, the equivalent parasitic capacitance 1010, and the equivalent sensing capacitance. In the 111n, the equivalent voltage after the charge balance distribution is obtained by the measuring unit 150, and the equivalent voltage is calculated in the same or similar manner as the second embodiment, and details are not described herein again.

Therefore, regardless of whether the panel 1000 operates in the first charge distribution mode or the second charge distribution mode, when the object 190 touches or approaches the panel 1000, the measured equivalent voltage changes due to charge redistribution as a touch. The basis for the judgment of the region. It should be noted that, in the present disclosure, the first charge distribution mode may also be referred to as a positive charge distribution mode (PCD), and the second charge distribution mode may also be referred to as a negative charge distribution mode (Negative distribution setting, NCD). In addition, the sensing capacitor, the equivalent sensing capacitor, the equivalent parasitic capacitance, the external sensing capacitor, and the object equivalent capacitance of the corresponding embodiments of the above embodiments are not solid capacitor structures, and are only used to explain the operation principle of the disclosure, and This is limited to this.

In summary, in the above embodiment of the present disclosure, the touch sensing device alternately performs a charge injection and charge distribution process, and obtains an equivalent voltage after the charge balance distribution. Since the sensing method does not require an additional high-precision capacitor, the voltage distribution on the entire panel can be obtained by measuring the equivalent voltage to determine the area touched or close to the object, so that the disclosure has a simple circuit structure. And the advantage of lower cost.

Furthermore, since the operational precision of the present disclosure is independent of the absolute value of the capacitance, the same integrated circuit design can be applied to the touch panel in the touch device (the touch panel is adapted or displayed in other ways). The panel or other component constitutes the touch device, or is disposed directly inside the display panel or on its surface. In general, if the touch circuit is disposed directly inside or on the surface of the display panel, the manufacturing cost is low, but the capacitance used needs to have a large absolute value of the sensing capacitance. However, since the operational precision of the present disclosure is independent of the absolute value of the capacitance, whether it is applied to the touch panel or directly disposed inside or on the surface of the display panel, it is not necessary to separately manufacture and adjust the large capacitance for the latter. The version has the advantage of simplifying the general category and item of the product.

The present invention has been disclosed in the above embodiments, but it is not intended to limit the invention, and the present invention may be modified and modified without departing from the spirit and scope of the invention. The scope of protection is subject to the definition of the scope of the patent application.

100. . . Charge distribution type touch sensing device

1000. . . panel

1010, 1020, 1030, 1040, 1050, 1060. . . Equivalent parasitic capacitance

1011~1016. . . Sensing area

1021 ~ 1026. . . Sensing area

1031 ~ 1036. . . Sensing area

1041 ~ 1046. . . Sensing area

1051~1056. . . Sensing area

1061 ~ 1066. . . Sensing area

1111～1166. . . Inductive capacitor

111n. . . Equivalent inductance

120. . . First axial switching unit

1211~1216. . . switch

1221 ~ 1226. . . switch

130. . . Second axial switching unit

1311 ~ 1316. . . switch

131n. . . Equivalent switch

1321 ~ 1326. . . switch

132n. . . Equivalent switch

140. . . Switch control unit

150. . . Measuring unit

151. . . Computing module

160. . . Processing unit

170. . . First axial scanning unit

180. . . Second axial scanning unit

190. . . object

1910. . . First external sensing capacitor

1920. . . Second external sensing capacitor

1930. . . Object equivalent resistance

1940. . . Object equivalent capacitance

X1 ~ X6. . . First axial electrode

Y1～Y6. . . Second axial electrode

FIG. 1 is a circuit block diagram of a charge distribution type touch sensing device according to an embodiment of the disclosure.

FIG. 2A is a partial circuit diagram showing the charge distribution type touch sensing device shown in FIG. 1.

FIG. 2B is a partial circuit equivalent diagram of the charge distribution type touch sensing device as shown in FIG. 2A.

FIG. 3 is a schematic flow chart of a charge distribution type touch sensing method according to an embodiment of the disclosure.

FIG. 4A is a partial circuit equivalent diagram of the charge distribution type touch sensing device in the first switching mode in the first embodiment.

FIG. 4B is a partial circuit equivalent diagram of the charge distribution type touch sensing device disposed in the second switching mode in the first embodiment.

FIG. 5A is a partial circuit equivalent diagram of the charge distribution type touch sensing device when the object touches the scanned sensing area in the first switching mode in the first embodiment.

FIG. 5B is a partial circuit equivalent diagram of the charge distribution type touch sensing device when the object touches the scanned sensing area in the second switching mode in the first embodiment.

FIG. 6A is a partial schematic diagram showing the circuit of the charge distribution type touch sensing device when the object touches the unscanned sensing area in the first switching mode in the first embodiment.

FIG. 6B is a partial schematic diagram showing the circuit of the charge-distributing touch sensing device when the object touches the unscanned sensing region in the second switching mode in the first embodiment.

FIG. 7A is a partial circuit equivalent diagram of the charge distribution type touch sensing device disposed in the first switching mode in the second embodiment.

FIG. 7B is a partial circuit equivalent diagram of the charge distribution type touch sensing device disposed in the second switching mode in the second embodiment.

FIG. 8A is a partial circuit equivalent diagram of the charge distribution type touch sensing device disposed in the first switching mode in the third embodiment.

FIG. 8B is a partial circuit equivalent diagram of the charge distribution type touch sensing device disposed in the second switching mode in the third embodiment.

FIG. 9A is a partial circuit equivalent diagram of the charge distribution type touch sensing device disposed in the first switching mode in the fourth embodiment.

FIG. 9B is a partial circuit equivalent diagram of the charge distribution type touch sensing device disposed in the second switching mode in the fourth embodiment.

310～380. . . Steps

Claims (15)

A charge distribution type touch sensing method includes: excluding a charge in a panel; providing a scan signal to scan a plurality of sensing regions of the panel; and setting the panel in a first switching mode to transmit the scan signal pair The panel is charged; the panel is set in a second switching mode to change the distribution state of the charge injected by the panel; and the equivalent voltage after the charge balance distribution is obtained. The charge distribution touch sensing method of claim 1, wherein the scan signal comprises a plurality of voltage levels. The charge-distributing touch sensing method of claim 2, wherein the panel injects and distributes a charge according to the scan signal in a positive charge distribution mode or a negative charge distribution mode. The charge-distributing touch sensing method of claim 3, wherein when the panel is disposed in the first switching mode, the scanning signal is injected with a charge into one of the sensing regions of the sensing region and the panel One of the equivalent parasitic capacitances. The charge-distributing touch sensing method of claim 4, wherein when the panel is disposed in the second switching mode, the charge injected by the sensing capacitor and the equivalent parasitic capacitance is redistributed to the sensing capacitor, The equivalent parasitic capacitance is equivalent to one of the sensing regions that are not scanned. The charge-distributing touch sensing method of claim 3, wherein when the panel is disposed in the first switching mode, the scan signal is injected with an electric charge to induce an equivalent of one of the sensing regions that are not scanned. In the capacitor. The charge-distributing touch sensing method of claim 6, wherein when the panel is disposed in the second switching mode, the charge injected by the equivalent sensing capacitor is redistributed to one of the sensing regions that are scanned. Capacitance, one of the equivalent parasitic capacitances of the panel and the equivalent inductive capacitance. The charge-distributing touch sensing method of claim 3, wherein when the panel is disposed in the first switching mode, one of the sensing regions of the sensing region that is scanned, one of the panel is equivalent to parasitic capacitance and The equivalent sense capacitance of one of the sensing regions that are scanned excludes all charges through the scan signal. The charge-distributing touch sensing method of claim 8, wherein when the panel is disposed in the second switching mode, the scan signal is injected and distributed to the sensing capacitor, the equivalent parasitic capacitance, and the Equivalent to the sensing capacitor. The charge-distribution touch sensing method of claim 1, further comprising: determining whether the sensing regions of the panel are scanned to determine whether to determine the obtained equivalent voltage; and scanning the sensing regions When finished, it is determined whether an object touches or approaches the panel according to the change of the equivalent voltage; and when the sensing regions have not been scanned, the scanning procedure of one of the sensing regions is performed. The charge-distributing touch sensing method of claim 10, wherein when the object touches or approaches the panel, a plurality of sensing paths are formed between the object and the panel, so that the charge is redistributed, resulting in an equivalent voltage. The change. The charge-distributing touch sensing method of claim 1, wherein the step of setting the panel in the first switching mode to charge the panel further comprises: sensing capacitance in the sensing regions to be scanned, The equivalent parasitic capacitance of the panel and the equivalent inductive capacitance of the unscanned sensing region of the panel are charged to a low voltage level or a zero voltage level. A charge distribution type touch sensing device includes: a plurality of first axial electrodes disposed in a panel; a plurality of second axial electrodes disposed in the panel and interlaced with the first axial electrodes The first axial switch unit is electrically coupled to the first axial electrodes; the second axial switch unit is electrically coupled to the second axial electrodes; The switch control unit is electrically coupled to the first axial switch unit and the second axial switch unit for controlling a switching mode of the first axial switch unit and the second axial switch unit to transmit a scan a signal is injected and distributed in the panel; a measuring unit electrically coupled to the first axial switching unit for obtaining an equivalent voltage after charge balancing distribution; and a processing unit electrically coupled to the amount The measuring unit and the switch control unit determine whether an object touches or approaches the panel according to a change in the equivalent voltage obtained by the measuring unit. The touch sensing device of claim 13, wherein the panel is a touch panel, and the first axial electrodes are disposed on an outer surface or an inner surface of a glass substrate of the touch panel, and the second The axial electrode is disposed on an outer side surface or an inner side surface of a glass substrate in the touch panel. The touch sensing device of claim 13, wherein the panel is a display panel, the first axial electrodes are located inside the surface of the display panel or the surface thereof, and the second axial electrodes are located inside the display panel or Its surface.